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Evaluates whether a string is in valid JSON (JavaScript Object Notation) data interchange format.

Method Signature

Arguments

Argument
Type
Required
Description
Default

Examples

isJSON Example

Returns true when the argument is a valid JSON value.

Result: true

Additional Examples

Related

writeDump( label="Array", var=isJson( "[1,2,3]" ) );
writeDump( label="Single number value", var=isJson( 1 ) );
writeDump( label="String value", var=isJson( "susi12345" ) );
writeDump( label="String value with serializeJSON", var=isJson( JSONSerialize( "susi" ) ) );
writeDump( label="Boolean value with serializeJSON", var=isJson( JSONSerialize( true ) ) );
writeDump( label="CreateDateTime with serializeJSON", var=isJson( JSONSerialize( CreateDateTime( 2018, 1, 1, 1, 1, 1 ) ) ) );
qry = queryNew( "aaa,bbb", "varchar, varchar", [
	[
		"a",
		"b"
	],
	[
		"c",
		"d"
	]
] );
writeDump( label="Query", var=isJson( qry ) );
  1. BoxLang Language
  2. Reference
  3. Built-in Functions
  4. decision

IsJSON

PreviousIsIPv6NextIsLeapYear
IsJSON(var=[any])

var

any

true

The value to test for JSON

isJSON( "[1,2,3]" );
Run Example
Run Example
ArrayIsEmpty
IsXMLDoc
IsBinary
IsDate
IsNumericDate
IsDefined
IsEmpty
structIsEmpty
arrayIsEmpty
Attempt
IsCustomFunction
IsObject
IsDateObject
IsXmlAttribute
IsValid
IsDebugMode
IsBoolean
IsLeapYear
IsQuery
IsArray
IsXML
IsIPv6
IsNull
IsClosure
IsNumeric
LSIsNumeric
IsSimpleValue
IsStruct
IsXMLElem
IsXMLNode
IsXMLRoot
IsLocalHost
IsFileObject
  • Method Signature
  • Arguments
  • Examples
  • isJSON Example
  • Additional Examples
  • Related